File openvpn-CVE-2018-7544.patch of Package openvpn

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File openvpn-CVE-2018-7544.patch of Package openvpn (Revision 8ccd052c90487f1e88147282413d37a9)

Currently displaying revision 8ccd052c90487f1e88147282413d37a9 , Show latest

--- doc/openvpn.8.orig
+++ doc/openvpn.8
@@ -2519,54 +2519,52 @@ the compression efficiency will be very
 compression for a period of time until the next re-sample test.
 .\"*********************************************************
 .TP
+.B \-\-management socket\-name unix [pw\-file] \ \ \ \ \ (recommended)
+.TQ
 .B \-\-management IP port [pw-file]
-Enable a TCP server on
-.B IP:port
-to handle daemon management functions.
-.B pw-file,
-if specified,
-is a password file (password on first line)
-or "stdin" to prompt from standard input.  The password
-provided will set the password which TCP clients will need
-to provide in order to access management functions.
-
-The management interface can also listen on a unix domain socket,
-for those platforms that support it.  To use a unix domain socket, specify
-the unix socket pathname in place of
-.B IP
-and set
-.B port
-to 'unix'.  While the default behavior is to create a unix domain socket
-that may be connected to by any process, the
+Enable a management server on a
+.B socket\-name
+Unix socket on those platforms supporting it, or on
+a designated TCP port.
+
+.B pw\-file
+, if specified, is a password file where the password must be on first line.
+Instead of a filename it can use the keyword stdin which will prompt the user
+for a password to use when OpenVPN is starting.
+
+For unix sockets, the  default  behaviour  is to create a unix domain socket
+that may be connected to by any process.  Use the
 .B \-\-management\-client\-user
 and
 .B \-\-management\-client\-group
-directives can be used to restrict access.
+directives to restrict access.
+
+The management interface provides a special mode where the TCP management link
+can operate over the tunnel itself.  To enable this mode, set IP to
+.B tunnel.
+Tunnel mode will cause the  management interface to listen for a
+TCP connection on the local VPN address of the TUN/TAP interface.
+
+.B BEWARE
+of enabling the management interface over TCP.  In  these cases you should
+.I ALWAYS
+make use of
+.B pw\-file
+to password protect the management interface.  Any user who can connect to this
+TCP
+.B IP:port
+will be able to manage and control (and interfere with) the OpenVPN process.
+It is also strongly recommended to set IP to 127.0.0.1 (localhost) to restrict
+accessibility of the management server to local clients.
+
+While the management port is designed for  programmatic control of OpenVPN by
+other applications, it is possible to telnet to the port, using a telnet client
+in "raw" mode.  Once  connected, type "help" for a list of commands.
+
+For detailed documentation on the management interface, see the
+.I management\-notes.txt
+file in the management folder of the OpenVPN source distribution.
 
-The management interface provides a special mode where the TCP
-management link can operate over the tunnel itself.  To enable this mode,
-set
-.B IP
-= "tunnel".  Tunnel mode will cause the management interface
-to listen for a TCP connection on the local VPN address of the
-TUN/TAP interface.
-
-While the management port is designed for programmatic control
-of OpenVPN by other applications, it is possible to telnet
-to the port, using a telnet client in "raw" mode.  Once connected,
-type "help" for a list of commands.
-
-For detailed documentation on the management interface, see
-the management-notes.txt file in the
-.B management
-folder of
-the OpenVPN source distribution.
-
-It is strongly recommended that
-.B IP
-be set to 127.0.0.1
-(localhost) to restrict accessibility of the management
-server to local clients. 
 .TP
 .B \-\-management\-client
 Management interface will connect as a TCP/unix domain client to
--- src/openvpn/options.c.orig
+++ src/openvpn/options.c
@@ -1947,6 +1947,14 @@ options_postprocess_verify_ce (const str
   if ((options->management_client_user || options->management_client_group)
       && !(options->management_flags & MF_UNIX_SOCK))
     msg (M_USAGE, "--management-client-(user|group) can only be used on unix domain sockets");
+
+  if (!(options->management_flags & MF_UNIX_SOCK)
+      && (!options->management_user_pass))
+  {
+      msg(M_WARN, "WARNING: Using --management on a TCP port WITHOUT "
+          "passwords is STRONGLY discouraged and considered insecure");
+  }
+
 #endif
 
   /*

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File openvpn-CVE-2018-7544.patch of Package openvpn (Revision 8ccd052c90487f1e88147282413d37a9)

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